* Roman Cheplyaka <r...@ro-che.info> [2010-06-17 12:40:59+0300] > I'm trying to optimize the following program: > http://github.com/feuerbach/particles/blob/303c8a17c9b732e22457b5409bdce4b7520be94a/run.hs > > Of course general suggestions are welcome (BTW I'm going to give a try > to vector), but currently I'm concerned with two questions: > > 1. Heavy allocations in 'distance' function. Here is (part of) the profile: > > COST CENTRE MODULE %time %alloc ticks bytes > > d2 Main 9.0 22.0 290 600000000 > d Main 8.6 65.9 278 1800000000 > d1 Main 7.5 11.0 242 299700000 > > >From reading core I got the impression that everything is strict & > unboxed. Perhaps this is related to creating some closures? How to get > rid of those allocations? > > 2. Again from reading the core I learned that although 'l' and other > constants are inlined, their type is boxed Double. This makes sense > since CAFs are evaluated on demand, but obviously in this particular > case it does not make sense, so can I somehow make them unboxed?
Forgot to mention, I'm using ghc 6.12.1, compiling with -O2. -- Roman I. Cheplyaka :: http://ro-che.info/ "Don't let school get in the way of your education." - Mark Twain _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
